#include<stdio.h>
void movedisc(unsigned n,char fromneedle,char toneedle,char usingneedle);
int i=0;
int main()
{
    unsigned n;
    printf("please enter the number of disc:");
    scanf("%d",&n);
    printf("\tneedle:\ta\t b\t c\n");
    movedisc(n,'a','c','b'); 
    printf("\t Total: %d\n",i);
}
void movedisc(unsigned n,char fromneedle,char toneedle,char usingneedle)
{
    if(n>0)
    {
        movedisc(n-1,fromneedle,usingneedle,toneedle);

        ++i;
        switch(fromneedle) 
        {
            case 'a': switch(toneedle)
            {
                case 'b': printf("\t[%d]:\t%2d------------->%2d\n",i,n,n);
                break;
                case 'c': printf("\t[%d]:\t%2d------------->%2d\n",i,n,n);
                break;
            }
            break;
            case 'b': switch(toneedle)
            {
                case 'a': printf("\t[%d]:\t%2d--------------->%2d\n",i,n,n);
                break;
                case 'c': printf("\t[%d]:\t %2d--------------->%2d\n",i,n,n);
                break;
            }
            break;
            case 'c': switch(toneedle)
            {
                case 'a': printf("\t[%d]:\t%2d<------------------%2d\n",i,n,n);
                break;
                case 'b': printf("\t[%d]:\t%2d<------------------%2d\n",i,n,n);
                break;
            }
            break;
        }
movedisc(n-1,usingneedle,toneedle,fromneedle);

    }
}